Executive Management Brian Mueller Chief Executive Officer (314) 223-4515 Contact + Bio Andrew Holthaus Executive Vice President (314) 413-2665 Contact + Bio Mike Westcott Chief Financial Officer (636) 236-9441 Contact + Bio Ted Stilgenbauer President/Chief Operating Officer (724) 557-9680 Contact + Bio Nick Sisler Vice President Operations (724) 557-9775 Contact + Bio Brian Sasselli Vice President Engineering (724) 557-1483 Contact + Bio Senior Management Stephanie Yatchyshyn Human Resource Manager (724) 557-7160 Contact + Bio John Nugent Sales & Contract Manager (724) 434-4102 Contact + Bio Duane Lenk Controller (618) 281-4577 Contact + Bio